BR section 4, passage #7, question 45

[SCX1]

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For this question, I don't get why if the student drops the weight, his angular velocity does not change. The answer said the angular momentum is conserved because the falling weights continue to move in their circular pathway as they fall? I don't understand the explanation.
Any input would be appreciated. Thank you.

 

[hiaips]

Can you post the question?

 

[aspiringdoc09]

I asked this same question like last week. Here is the link: http://forums.studentdoctor.net/showthread.php?t=916383